. >> reporter: the lesson so far is that america and our allies have used violence to save many libyan lives, but have failed to remove moammar gadhafi from power. i'm steve handelsman, nbc news, washington. >>> almost a year after the start of the gulf coast oil disaster, the justice department is considering manslaughter charges in the deaths of 11 workers killed when the deepwater horizon rig exploded. according to "the washington post," any such charges would probably involve bp or transocean which leaked the rig to bp. a bp employee has lost a laptop containing the personal data of 18,000 people who filed claims because of the disaster. bp has mailed letters notifying them of the potential breach. >>> the u.s. government says it is sending robotic equipment to japan to help the country regain control of its crippled nuclear plant. such devices built to withstand radiation, they could work presumably in areas where radiation levels could harm or kill humans. meanwhile, the japanese government is now admitting what many assumed, that its safeguards to protect the facility against an